文献类型： 外文期刊
作者： Qiu, Wenming 1 ; Soares, Juliana 2 ; Pang, Zhiqian 2 ; Huang, Yixiao 2 ; Sun, Zhonghai 1 ; Wang, Nian 2 ; Grosser, Jud 1 ;
作者机构： 1.Hubei Acad Agr Sci, Inst Fruit & Tea, Wuhan 430064, Peoples R China
2.Univ Florida, Citrus Res & Educ Ctr, Lake Alfred, FL 33850 USA
关键词： Citrus sinensis; disease resistance; HLB; innate immunity; RNAseq
期刊名称：INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES （ 影响因子：5.923； 五年影响因子：6.132 ）
ISSN：
年卷期： 2020 年 21 卷 6 期
页码：
收录情况： SCI
摘要： Huanglongbing (HLB), a bacterial disease caused by Candidatus Liberibacter asiaticus (CLas), is a major threat to the citrus industry. In a previous study conducted by our laboratory, several citrus transgenic trees expressing the Arabidopsis thaliana NPR1 (AtNPR1) gene remained HLB-free when grown in a field site under high HLB disease pressure. To determine the molecular mechanisms behind AtNPR1-mediated tolerance to HLB, a transcriptome analysis was performed using AtNPR1 overexpressing transgenic trees and non-transgenic trees as control, from which we identified 57 differentially expressed genes (DEGs). Data mining revealed the enhanced transcription of genes encoding pathogen-associated molecular patterns (PAMPs), transcription factors, leucine-rich repeat receptor kinases (LRR-RKs), and putative ankyrin repeat-containing proteins. These proteins were highly upregulated in the AtNPR1 transgenic line compared to the control plant. Furthermore, analysis of protein-protein interactions indicated that AtNPR1 interacts with CsNPR3 and CsTGA5 in the nucleus. Our results suggest that AtNPR1 positively regulates the innate defense mechanisms in citrus thereby boosting resistance and effectively protecting the plant against HLB.
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